Design, construction, and preliminary performance of an insulation cover with capillary barrier effects at Meadowbank mine, Nunavut
Vincent Boulanger-Martel, Bruno Bussière, Jean Côté, Patrice Gagnon
In the proceedings of: GeoOttawa 2017: 70th Canadian Geotechnical Conference; 12th joint with IAH-CNCSession: Mining - Reclamation and Covers II
ABSTRACT: This in situ research assesses the potential for using a cover with capillary barrier effects, made entirely of non-acid generating waste rocks, to control acid mine drainage generation from tailings impoundments located in cold regions. This paper presents preliminary results from a field experimental cell built at Meadowbank mine (NU). The field experimental cell is equipped with temperature, unfrozen volumetric water content, and oxygen consumption monitoring stations. Results from the first year of temperature monitoring indicate that temperatures in the tailings are controlled by the cover materials. The moisture-retaining layer approached saturation at the end of the first summer which should control oxygen diffusion from the atmosphere to the reactive tailings. Results indicate that both the mine waste temperatures and/or oxygen fluxes appear to be controlled, thus acid mine drainage generation should be limited year-round.
RÉSUMÉ: Cette recherche in situ évalue le potentiel d'une couverture avec des effets de barrière capillaire entièrement constituée de stériles miniers non potentiellement générateurs d'acidité pour contrôler la génération de drainage minier acides des parcs à résidus miniers situés en conditions nordiques. Cet article présente des cellule expérimentale de terrain construite à la mine Meadowbank (NU). La cellule expérimentale de terrain est équipée de stations de monitoring de la teneur en eau volumique non gelée, de la température et de la consommation d'oxygène. Les résultats de la première année de suivi indiquent que la température des résidus est contrôlée par les matériaux de recouvrement. La couche de rétention d'humidité a approché la saturation à la fin du premier été, ce qui devrait permettre de contrôler la . Les résultats indiquent que les températures des résidus miniers et/ou les flux d'oxygène semblent contrôlés, de sorte que la production de drainage minier acide devrait être limitée toute l'année.
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Vincent Boulanger-Martel; Bruno Bussière; Jean Côté; Patrice Gagnon (2017) Design, construction, and preliminary performance of an insulation cover with capillary barrier effects at Meadowbank mine, Nunavut in GEO2017. Ottawa, Ontario: Canadian Geotechnical Society.
@article{geo2017Paper354,
author = Vincent Boulanger-Martel; Bruno Bussière; Jean Côté; Patrice Gagnon,
title = Design, construction, and preliminary performance of an insulation cover with capillary barrier effects at Meadowbank mine, Nunavut,
year = 2017
}
title = Design, construction, and preliminary performance of an insulation cover with capillary barrier effects at Meadowbank mine, Nunavut,
year = 2017
}